diff --git a/setup.py b/setup.py
index e8f9b52..adf1e12 100644
--- a/setup.py
+++ b/setup.py
@@ -28,6 +28,13 @@ setuptools.setup(
         'pikepdf',
     ],
     classifiers=[
-        'Python :: 3'
+        'Development Status :: 3 - Alpha',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: MIT License',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3 :: Only',
     ],
 )